diff options
| author | Ian Romanick <[email protected]> | 2015-09-09 10:27:04 -0700 |
|---|---|---|
| committer | Ian Romanick <[email protected]> | 2015-09-10 20:29:51 -0700 |
| commit | 4603723722127e707a5c1fa28736ee932f326846 (patch) | |
| tree | 40b3fbd09fec3cd1228807e63e7d3111d962ac5a /src/mesa/drivers | |
| parent | 767c33e88138afa64443417860b264a494eba33d (diff) | |
meta: Use result of texture coordinate clamping operation
Previously the result of the complicated clamp() expression just dropped
on the floor: clamp does not modify any of its parameters. Looking at
the surrounding code, I believe this is supposed to modify the value of
tex_coord.
This change (along with a change to avoid the use of
brw_blorp_framebuffer) does not affect any existing piglit tests. I'm
not sure what this clamp is trying to accomplish, so I'm not sure how to
write a test to exercise this path.
I also noticed another bug in this code. There is no way the array
texture case could possibly work. This will generate code for the
TEXEL_FETCH macro like:
#define TEXEL_FETCH(coord) texelFetch(texSampler, ivec3(coord), sample_map[int(2 * fract(coord.x))]);
Since the coord parameter of this macro is a vec2 at all invocations, no
expansion of this macro will even compile.
Signed-off-by: Ian Romanick <[email protected]>
Reviewed-by: Anuj Phogat <[email protected]>
Cc: Topi Pohjolainen <[email protected]>
Cc: Jordan Justen <[email protected]>
Diffstat (limited to 'src/mesa/drivers')
| -rw-r--r-- | src/mesa/drivers/common/meta_blit.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/mesa/drivers/common/meta_blit.c b/src/mesa/drivers/common/meta_blit.c index 71d18de87db..a41fe42338f 100644 --- a/src/mesa/drivers/common/meta_blit.c +++ b/src/mesa/drivers/common/meta_blit.c @@ -187,8 +187,8 @@ setup_glsl_msaa_blit_scaled_shader(struct gl_context *ctx, " vec2 tex_coord = texCoords - s_0_offset;\n" "\n" " tex_coord *= scale;\n" - " clamp(tex_coord.x, 0.0f, scale.x * src_width - 1.0f);\n" - " clamp(tex_coord.y, 0.0f, scale.y * src_height - 1.0f);\n" + " tex_coord.x = clamp(tex_coord.x, 0.0f, scale.x * src_width - 1.0f);\n" + " tex_coord.y = clamp(tex_coord.y, 0.0f, scale.y * src_height - 1.0f);\n" " interp = fract(tex_coord);\n" " tex_coord = ivec2(tex_coord) * scale_inv;\n" "\n" |